chore(deps): update actions/checkout action to v3

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v2 -> v3

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Release Notes

actions/checkout

### [`v3`](https://togithub.com/actions/checkout/blob/HEAD/CHANGELOG.md#v300) [Compare Source](https://togithub.com/actions/checkout/compare/v2...v3) - [Update to node 16](https://togithub.com/actions/checkout/pull/689)

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Configuration

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[codecov[bot]]

Codecov Report

Merging #186 (1986cf6) into master (6af6b7f) will increase coverage by 0.05%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #186      +/-   ##
==========================================
+ Coverage   82.36%   82.41%   +0.05%     
==========================================
  Files          21       21              
  Lines         652      654       +2     
==========================================
+ Hits          537      539       +2     
  Misses        115      115              

Impacted Files	Coverage Δ
feedback/lib/src/feedback_bottom_sheet.dart	81.96% <100.00%> (+0.30%)	:arrow_up:
feedback/lib/src/l18n/translation.dart	42.85% <0.00%> (-0.78%)	:arrow_down:
feedback/lib/src/better_feedback.dart	97.77% <0.00%> (+2.22%)	:arrow_up:

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